Sean. My son has a 2008 Focus 1.6TDCi. It has been fine

Customer Question

Hi Sean. My son has a 2008 Focus 1.6TDCi. It has been fine until it had a dpf fault last year which resulted in a new dpf being fitted. The one fitted came from EuroCarParts. Two weeks ago it had to go back into the garage to have the turbo hose (rubber) replaced due to a split. The garage noted that the oil level was way over MAX. They dropped the oil and replaced it with a new filter. Yesterday I checked the oil and, again, it was 15mm above MAX. The garage are scratching their heads over this. On the invoice for the dpf work they mentioned 'possible damaged sensor' but didn't specify what sensor. Would this have a bearing on the oil level increasing?

Hi there ,good afternoon to youOk the oil level rising will most commonly be down to the DPF trying to regenerateWhen the soot loading in the filter reaches a set limit (about 35%-50%) the vehicle's PCM will initiate post combustion fuel injection to raise the exhaust temperature and trigger an active regeneration of the DPFIf the journey is too short or engine too cold while the regeneration is in progress, it may not complete the regenerationThis can lead to the oil becoming diluted with dieselIn your case when the the DPF was replaced the learned values were most likely not resetTherefore the PCM doesn't know it has a new empty filter thus it will try and regenerate the DPF when really it doesn't need itAfter replacing the DPF the learned values if both the DPF and DPF pressure sensor should be reset using compatible diagnostic softwareIf you need anymore help or advice on this issue please let me knowIf you are Completely satisfied with my answer /advicePLEASE RATE MY ANSWERKind regards ***** ***** and have a nice dayBrian

Hi. I took the car back to my garage with the information you provided. They had reset the learned values when the DPF filter was changed. Interrogating the ECU today revealed that the engine had tried, unsuccessfully, to regenerate the DPF five times since the filter was changed. They spoke to the Ford Technical Department which was very helpful. Further tests including a smoke test on the engine, revealed that a rigid plastic pipe at the rear of the engine (forgot the name) had two holes in it. This pipe was replaced and further tests done. The ECU was still trying to initiate a regeneration cycle, which wasn't completing. They replaced the DPF sensor with a new one and forced a regeneration, which completed successfully. Everything is now how it should be.

Hi there good evening to youThat's great newsI just wanted to be sure that the DPF Lindvall use had been reset as this can cause us to shoot my next stage would be to give you some tests on the centra I just wanted to be sure that the DPF learned values had been reset as this can cause this issue which was in turn down to failed regenerations causing the oil to dilutemy next step awaiting your reply was to give you some tests on the DPFsensor using a mumtimeterBut Iam glad we have resolved the issueIf you ever need any future help or advice with your vehicle please let me know and I will do my upmost to assist youIf you have been Completely satisfied with my answer /advicePLEASE RATE MY ANSWERKind regards ***** ***** and have a nice eveningBrian

Hi thereYes this was the next step I was going to advise as Iam surprised this wasn't tested when the original fault was identified as this was probably the route cause of the DPF blocking upRegards ***** *****Brian

What Customers are Saying:

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.Charles

As a single woman, I really appreciate an excellent and affordable opinion. Thank you Geordie, I will not hesitate to contact justanswer in the future!Sue

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.Stephanie P

Ask a Ford Mechanic

Get a Professional Answer. 100% Satisfaction Guaranteed.

39 Ford Mechanics are Online Now

Type Your Ford Question Here...

characters left:

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.